Finding the Fourth Proportional to 212,713.12, 319,193.70 and 79,686.82
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Solution
The fourth proportional to 212,713.12, 319,193.70 and 79,686.82 is: 119,576.69
Step by Step Solution
- Step 1: Write the proportion equation
212,713.12 : 319,193.70 = 79,686.82 : x - Step 2: Convert to fraction form
212,713.12/319,193.70 = 79,686.82/x - Step 3: Cross multiply
212,713.12x = 319,193.70 × 79,686.82 - Step 4: Simplify right side
212,713.12x = 25,435,530,917.03 - Step 5: Solve for x
x = 25,435,530,917.03/212,713.12 - Step 6: Final answer
x = 119,576.69
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.